JP2006022619A - Lock for door - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily fit a decorative ring into a housing of a cylinder lock by a "fingertip method". <P>SOLUTION: This lock for a door is characterized in that: parts to be engaged, which are formed on the outer peripheral wall of the housing, are a plurality of locking grooves formed in a recessed shape at predetermined intervals in the circumferential direction of the outer peripheral wall; and a plurality of engaging arms, which are elongated toward an internal space, which have engaging pawl pieces capable of being each engaged with the locking grooves in fitting and which have the elastic deformation or elastic return function of being displaced by virtue of the property of a material itself, are formed at the leading end of the decorative ring. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a door lock, and more particularly to a door lock in which a decorative ring is fitted on the outer periphery of a cylinder lock protruding from an outer wall surface of the door.

  2 and 6 of Patent Document 1 show a door comprising a cylindrical housing fixed to the door, a cylinder lock fixedly installed in the housing, and a cylindrical decorative ring fitted to the housing. A lock is disclosed.

  In the embodiment shown in FIG. 2, when a suitable conical decorative ring with the tip cut off is directly or indirectly fitted to the cylinder lock housing, first, the front plate is attached to the cylinder lock fixed cylinder. Before inserting the cylindrical body, the first spacer ring is extrapolated so as to hit the flange at the tip of the cylindrical body, then the second spacer ring is extrapolated, and then the necessary After extrapolating the number of spacer rings, the decorative ring is extrapolated to the cylindrical body. Or, the fitting procedure may of course be reversed. First, a plurality of spacer rings for adjustment are fitted on the front end side of the decorative ring, and then a cylinder having a predetermined thickness having a flange portion on the front end portion. The shaped body is inserted into the penetrating state from the front end side of the decorative ring. Thus, the embodiment shown in FIG. 2 cannot easily fit the decorative ring to the cylinder lock housing.

  This also applies to the embodiment shown in FIG. In this embodiment, instead of the spacer ring, a coil spring is externally supported on the outer periphery of the housing, and the large-diameter inner end of the decorative ring abuts against the outer wall surface of the door by the spring force of the coil spring.

However, in this embodiment, since the decorative ring having the outer peripheral wall having the shape of a horizontal truncated cone in the cross section and the coil spring are separate, for example, the decorative ring is extrapolated to the housing for the cylinder lock, and then the outer periphery of the housing is A coil spring is inserted into a gap generated between the wall and the inner cylindrical connecting portion of the decorative ring, and then a cylindrical body called a front plate is fitted into the gap so that the coil spring is connected to the inner cylindrical connecting portion. As a result, it is necessary to hold the stopper part provided in a protruding wall shape around the inner end of the cylinder and the insertion end face of the cylindrical body, so that the decorative ring cannot be easily fitted to the cylinder lock housing. was there.
Each Example of FIG. 2, FIG. 6 described in patent publication 2003-120083 gazette.

  The main object of the present invention is that the decorative ring can be easily fitted to the cylinder lock housing by the “one-touch method”. Another object of the present invention is that once the decorative ring is fitted, it is securely locked to the housing and cannot be pulled out easily. An additional object of the present invention is that the cylinder lock is not easily removed by a tool.

  The door lock of the present invention is a door lock comprising a cylindrical housing fixed to the door, a cylinder lock fixedly provided in the housing, and a cylindrical decorative ring fitted to the housing. An engaged portion is formed on the outer peripheral wall of the housing, and the engaged portion is a plurality of locking grooves formed at a predetermined interval in the circumferential direction of the outer peripheral wall. At the tip of the ring, there are engaging claw pieces that extend toward the inner space and can be respectively engaged with the locking grooves when fitted, and also perform elastic deformation or elastic return function that is displaced by the material itself. A plurality of engagement arms are formed.

  In the above configuration, the engagement arm is formed continuously from the small-diameter outer end portion 32b of the outer peripheral wall 32 to the fitting continuous portion that is annularly formed in the inner space 34 formed by the outer peripheral wall 32. Has been. Further, the inner end portion 32a of the decorative ring 31 is externally fitted in a fitted state to the flange portion 11 that is provided around the housing 4 in a protruding wall shape.

  Here, the “housing” refers to a member that directly or indirectly wraps the cylinder lock.

  (1) FIG. 11 is a schematic explanatory view showing the function and effect of the present invention. Each of the plurality of engagement arms 36 has an engagement claw piece 35 projecting inward from the inner wall surface of the engagement arm 36, so that when the decorative ring 31 is fitted, as shown in FIG. Each engagement claw piece 35 slides on the inner wall surface of the horizontal groove 22 of the housing 4.

  Therefore, the engagement arm 36 has a function of allowing the engagement claw piece 35 to slide (elastic deformation function). Further, the engaging arm 36 has the engaging claw piece 35 in the locking groove 22 that is provided in a recessed shape in the horizontal groove 22 when the engaging claw piece 35 exceeds the inner wall surface of the horizontal groove 22. It has a function (elastic return function) of engaging and securing the engagement between the engaged portion 22 of the housing 4 and the engaging claw piece 35. Thus, the engagement arm 36 of the decorative ring 31 functions to be elastically deformed or elastically displaced by the material itself.

  (2) Since the decorative ring 31 of the present invention has an elastic deformation or elastic return function as described in (1), the decorative ring can be easily fitted to the cylinder lock housing by the “one-touch method”. it can.

  (3) Once the decorative ring is fitted into the housing, the decorative ring is securely locked to the housing by a plurality of engaging claw pieces and cannot be pulled out easily.

  (4) In the inventions according to claims 4 and 5, it is difficult to illegally unlock the cylinder lock with a tool.

  Hereinafter, the best mode for carrying out the present invention shown in FIGS. 1 to 11 will be described.

(1) Overall Environment The overall environment of the door lock X will be described with reference to FIGS. 1 and 2. 1 is a door for joinery. A door lock X is attached to the door 1, and the door 1 opens and closes in the horizontal direction. With reference to FIG. 1, 1a is an outer wall surface of the door and 1b is an inner wall surface. As is well known, a cylinder lock 2 is attached to the outer wall surface 1 a, and a thumb turn 3 is attached to the inner wall surface 1 b, and the driving force (operating force) is provided in the opening of the free end of the door 1. Are transmitted to the lock components (eg, dharma, locking lever, drive cam, etc.).

  Reference numeral 4 denotes a cylinder lock housing fixedly attached to the outer wall surface 1a of the door 1. The housing 4 has a function of an outer seat, and is provided with an inner seat 5 on the thumb turn 3 side and a plurality of fixing tools 6. Connected together.

  Reference numeral 7 denotes a protective member that covers the front surface of the cylinder lock 2, and this protective member 7 is externally fitted to a part of the protruding portion of the inner cylinder of the cylinder lock 2. The protective member 7 is made of cemented carbide, and its front surface is formed in a mortar shape.

  Reference numeral 31 denotes a decorative ring that wraps the tip side protruding from the wall surface of the housing 4, and the decorative ring 31 is a specific requirement of the present invention as described later. Hereinafter, constituent members related to the present invention will be described.

(2) Cylinder lock housing 4
The cylindrical housing 4 will be described with reference to FIGS. Reference numeral 11 denotes a collar portion that is provided in a protruding wall shape around the rear end portion or the central portion and has an inclined outer peripheral wall surface. Here, the front end portion 13 and the rear end portion 14 of the housing are distinguished on the basis of the flange portion 11.

  The housing 4 has a plurality of fitting holes that communicate with each other in the axial direction from the end surface of the rear end portion 14 to the end surface of the front end portion 13, and their cross-sectional shapes and radii are different. The cylinder lock 2 is inserted into the fitting hole from the end face of the rear end portion 14 (insertion), but here, the description will be given from the front end portion 13 side.

  First, reference numeral 15 denotes a stepwise lateral recess formed in an annular shape on the front surface of the tip portion 13, and the above-described protective member 7 is fitted into the lateral recess 15 in a close contact state. Reference numeral 16 denotes an annular support wall having a slightly smaller small fitting hole 17 at the center, and the protruding portion of the inner cylinder 25 is small so that the inner wall surface of the annular support wall 16 abuts the front end surface of the outer cylinder of the cylinder lock 2. The fitting hole 17 is fitted in a penetrating state.

  Next, a large fitting portion 31 is formed from the rear surface of the rear end portion 14 to the inner wall surface of the annular support wall 16 so as to communicate with the small fitting portion (small fitting hole) 17. 131 can be distinguished into two fitting parts.

  That is, the first fitting portion 19 is an annular rearward-facing large-diameter recess formed in a step shape at the end of the rear end portion 14 as shown in FIG. An annular locking plate described later is fitted. The outer peripheral edge portion of the locking plate engages with the annular vertical inner peripheral surface 19a of the first fitting portion 19 in a surface contact state. As will be described later, the locking plate is integrally attached to the rear end portion of the cylinder lock 2 and exhibits the function of preventing the cylinder lock from being pulled out.

  The second fitting portion 21 has a cross-sectional keyhole shape (the shape shown in FIG. 3) formed from the first fitting portion 19 to the annular support wall 16, and the second fitting portion 21 has an outside of the cylinder lock 2. The tube 24 is fitted. This 2nd fitting part 21 respond | corresponds to the external shape of the outer cylinder 24 of the cylinder lock 2 of a present Example.

  Therefore, the second fitting portion 21 is composed of a small-diameter hole 21a having a circular cross section and a fitting groove 21b having a concave cross-section communicating with the small-diameter hole 21a in the longitudinal direction in the axial direction. A cylindrical portion 23a of the outer cylinder 24 is fitted into the small diameter hole 21a, while a long plate or a book-like portion protruding in the longitudinal direction is fitted to a part of the outer peripheral wall of the outer cylinder 24 in the fitting groove 21b. To do.

  By the way, as shown in FIG. 4, a pair of upper and lower or left and right horizontal grooves 22 are formed on the outer peripheral wall of the distal end portion 13 of the housing 4 of this embodiment in the axial direction of the cylinder lock 2. Further, as shown in FIGS. 2 to 4, an engaged portion 23 is further formed in a step shape at the inner end portion of the horizontal groove 22. That is, the engaged portion 23 of the present embodiment is a plurality of locking grooves formed in a recess shape with a predetermined interval in the circumferential direction of the outer peripheral wall of the housing 4. These locking grooves 23 have a function of locking the decorative ring 31 fitted to the housing 4 at a predetermined position, as will be described later.

(3) Cylinder lock 2
The cylinder lock 2 fixedly housed in the housing 4 will be described with reference to FIGS. 1 and 5 to 7. The basic constituent members of the cylinder lock 2 are an outer cylinder 24, an inner cylinder 25 that is inserted into a fitting hole formed in the axial direction at the center of the outer cylinder 24, and can be rotated by a predetermined amount. A cylindrical driving shaft 26 having a driving protrusion 27 called a “tail piece” formed at the rear end of the inner cylinder 25 integrally with the inner cylinder 25 through fixing means or integrally formed with the inner cylinder; Consists of.

  Although not particularly shown, pin holes for incorporating obstructions (bottom pins, driver pins, springs) are respectively formed in the outer cylinder 24 and the inner cylinder 25 in the radial direction. In order to obtain a large number of key differences, a plurality of obstacles are arranged at predetermined intervals in the axial (longitudinal) direction of the outer cylinder 24 and the inner cylinder 25, and each obstacle is arranged in the radial direction by inserting a joint key. And the inner cylinder 25 is rotated in the unlocking direction by the operation of the key combination. In addition, since the internal structure of the cylinder lock 2 is not a limiting requirement of the present invention, description thereof is omitted.

  By the way, the outer cylinder 24 of the cylinder lock 2 is connected to the cylindrical portion 24a fitted into the small diameter hole 21a of the second fitting portion 21 of the housing 4, the outer peripheral wall of the cylindrical portion 24a, and 2 has a long plate-like portion 24b of a protrusion that fits into the fitting groove 21b of the fitting portion 21 (see FIG. 4).

  Further, the inner cylinder 25 of the cylinder lock 2 is inserted into the outer cylinder 24 so as to be inserted into the fitting hole of the outer cylinder 24, but the distal end portion of the inner cylinder 25 of this embodiment is the distal end of the outer cylinder 24. On the other hand, a part of the drive shaft 26 of the inner cylinder 25 slightly protrudes from the rear end surface of the outer cylinder 24. The distal end portion penetrates a small fitting portion (small fitting hole) 17 of the annular support wall 16 of the housing 4, and the protective member 7 is fitted to the penetrated portion (see FIG. 1).

(4) Pull-out prevention plate 231
An example of the pull-out prevention plate 231 is an annular locking plate. In this embodiment, the locking plate 28 having a diameter larger than that of the outer cylinder 24 of the cylinder lock 2 is a hard ring formed in an annular shape as shown in FIG. 28 is fitted so as to be fitted on the columnar protruding portion of the drive shaft 26 of the inner cylinder 26 described above, and is supported by a fixing means (retaining ring, nut, etc.) 29 so as not to be detached from the drive shaft 26. Has been. As the fixing means 29, a case using a retaining ring forms a circumferential groove in a protruding portion, while a case using a nut forms a male screw in the protruding portion.

(5) Cosmetic ring 31
31 is a cylindrical decorative ring that encloses the housing 4, and this decorative ring 31 is externally fitted to the protruding portion of the inner cylinder 25 of the cylinder lock 2 so that, for example, the thin cylindrical protective member 7 is in close contact with the front surface of the housing 4. After that, the housing 4 is integrally coupled (fitted) via a plurality of engagement arms 36 having the engagement claw pieces 35. Of course, the decorative ring 31 of the present embodiment can be fitted by the “one-touch method” from the distal end side of the housing 4 by an arbitrary procedure.

  Thus, 32 is a hollow pancreas-shaped outer peripheral wall that is transversely cross-sectional with respect to FIG. 9, and this outer peripheral wall 32 can be fitted onto the flange 11 of the housing 4. The inner diameter L of the large-diameter inner end portion 32 a of the outer peripheral wall 32 is set in consideration of the outer diameter L1 of the flange portion 11. Moreover, since the inner peripheral surface of the large-diameter inner end portion 32a and the outer peripheral wall surface of the flange portion 11 are inclined surfaces that can be brought into surface contact with each other, the large-diameter inner end portion 32a of the decorative ring 31 is the flange portion of the housing 4. 11 is fitted outside in a fitted state.

  Reference numeral 33 denotes a fitting continuous portion that is annularly formed from the small-diameter outer end portion 32b of the outer peripheral wall 32 into the inner space 34 formed by the outer peripheral wall 32. The annular fitting continuous portion 33 includes A plurality of (for example, two) engaging arms 36 each having an engaging claw piece 35 that can be engaged with the above-described locking groove 23 when fitted, and also having an elastic deformation or elastic restoring function that is displaced by the material itself. Are formed continuously.

  In the first embodiment of the present invention, the engaged portion 23 is a plurality of locking grooves formed in a recess shape with a predetermined interval in the circumferential direction of the outer peripheral wall. Even if 23 is changed to a locking projection, the essential matter of the invention remains unchanged. For example, a mountain-shaped engagement protrusion 23 may be formed in a part of the horizontal groove 22, and the engagement claw piece 35 of the engagement arm 36 may be engaged with the engagement protrusion 23.

  The present invention is mainly used in the joinery and lock industry.

FIG. 1 to FIG. 11 are explanatory views showing the best embodiments of the present invention.
The partial schematic cross section explanatory drawing which shows an example of embodiment of this invention. The schematic cross-section explanatory drawing of a housing. 3-3 line sectional explanatory drawing of FIG. The schematic explanatory drawing from the perspective of the principal part (a housing and a decorative ring). Schematic explanatory drawing of the principal part (cylinder lock). The schematic explanatory drawing from the right side on the basis of FIG. The schematic explanatory drawing of the principal part (draw-out prevention board). Front view of makeup ring Explanatory drawing based on the 9-9 line cross section of FIG. Explanatory drawing based on the 10-10 line cross section of FIG. Explanatory drawing which shows the effect | action and effect of this invention.

Explanation of symbols

X: Door lock, 1 ... Door, 2 ... Cylinder lock, 3 ... Thumb turn, 4 ... Housing, 5 ... Inner seat, 6 ... Fastener, 7 ... Protective member, 11 ... Gutter, 12 ... Through hole, 13 ... Front end portion, 14 ... rear end portion, 15 ... lateral recess, 16 ... annular support wall, 17 ... small fitting portion, 131 ... large fitting portion, 19 ... first fitting portion, 28 ... pull-out prevention plate (engagement) Stop plate), 21 ... second fitting portion, 22 ... horizontal groove, 23 ... engaged portion (locking groove), 24 ... outer cylinder, 25 ... inner cylinder, 26 ... drive shaft, 27 ... drive protrusion, DESCRIPTION OF SYMBOLS 29 ... Fixing means, 31 ... Cosmetic ring, 32 ... Outer peripheral wall, 33 ... Fitting connection part, 34 ... Internal space, 35 ... Engagement claw piece, 36 ... Engagement arm.

Claims (5)

In a door lock comprising a cylindrical housing fixed to the door, a cylinder lock fixedly provided in the housing, and a cylindrical decorative ring fitted to the housing, the outer peripheral wall of the housing is covered. An engaging portion is formed, and the engaged portion is a plurality of locking grooves formed at a predetermined interval in the circumferential direction of the outer peripheral wall, It has an engaging claw piece that extends toward the space and can be engaged with each of the locking grooves when fitted, and a plurality of engaging arms that are elastically deformed or elastically displaced by the material itself. A door lock characterized by that. The engagement arm according to claim 1, wherein the engagement arm is connected to a fitting continuous portion that is annularly extended from the small-diameter outer end portion 32 b of the outer peripheral wall 32 into the inner space 34 formed by the outer peripheral wall 32. A door lock characterized by being formed. 2. The door lock according to claim 1, wherein the inner end portion 32a of the decorative ring 8 is externally fitted in a fitted state to the flange portion 11 provided around the housing 4 in a protruding wall shape. In claim 1, an annular lateral recess 15 having an annular support wall 16 is formed at the front end portion of the housing, and the inner side of the cylinder lock 2 penetrating the annular support wall 16 is formed in the lateral recess 15. A door lock, wherein the protective member 7 is closely attached to the protruding portion of the tube 25. In claim 1, a fitting portion is formed in a stepped shape at the end of the rear end portion of the housing, and the fitting portion is fixed to the driving shaft of the inner cylinder of the cylinder lock via a fixing means. The door lock is characterized in that a pull-out prevention plate 28 that is locked to the vertical inner peripheral surface of the fitting portion is fitted.

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